Madrid-Valero, Juan J.; Ronald, Angelica; Shakeshaft, Nicholas; Schofield, Kerry; Malanchini, Margherita and Gregory, Alice M.. 2020. Sleep quality, insomnia, and internalizing difficulties in adolescents: insights from a twin study. SLEEP, 43(2), ISSN 0161-8105 [Article]

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Abstract or Description

Objectives: There is a well-established association between poor sleep quality and internalising traits. This relationship has previously been studied using a twin design. However, when it comes to adolescence, there is a paucity of twin studies that have investigated this relationship, despite the importance of this developmental stage for both the development of poor sleep quality and internalising symptoms. Additionally, anxiety sensitivity, which is commonly associated with poor sleep quality, has not been studied in this context. Our objective was to estimate genetic and environmental influences on the relationships between insomnia, poor sleep quality and internalising symptoms in adolescence.

Methods: Insomnia, poor sleep quality, depression, anxiety and anxiety sensitivity traits were measured in a sample of 5,111 twin pairs from the Twins Early Development Study, born between 1994 and 1996 (mean age 16.32y (SD=0.68)).

Results: A moderate proportion of the variance for the different variables (.29-.42) was explained by genetic factors. Associations between sleep and internalising variables were moderate (r = .34 - .46) and there was a large genetic overlap between these variables (rA= 0.51 – 0.73).

Conclusion: This study adds novel information by showing that there are large genetic correlations between sleep disturbances and internalising symptoms in adolescence.

Item Type:	Article
Identification Number (DOI):	https://doi.org/10.1093/sleep/zsz229
Additional Information:	TEDS is supported by a programme grant to Robert Plomin from the UK Medical Research Council (MR/M021475/1 and previously G0901245). This study was supported by Medical Research Council grant G1100559 to AR. J.J.M-V. is supported by predoctoral scholarship (19814/FPI/15) of the Fundación Seneca.
Keywords:	adolescence, anxiety, depression, insomnia, internalising, sleep, twins
Departments, Centres and Research Units:	Psychology
Dates:	Date Event 14 August 2019 Accepted 25 September 2019 Published Online February 2020 Published
Item ID:	26764
Date Deposited:	15 Aug 2019 11:29
Last Modified:	10 Jun 2021 22:37
Peer Reviewed:	Yes, this version has been peer-reviewed.
URI:	https://research.gold.ac.uk/id/eprint/26764

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